NWA 12468 – 21.78g (main mass)

$155.95

1 in stock

Description

Eucrite

Endcut – 21.78g
Sold with label/certificate of authenticity.


Northwest Africa 12468 (NWA 12468)
(Northwest Africa)
Purchased: 2015 Jun
Classification: HED achondrite (Eucrite)
History: Purchased in june 2015 at Saint Marie aux Mines mineral show
Physical characteristics: Dark-brown crusted stone. Cut surface reveals light-gray interior.
Petrography: Igneous rock with brecciated texture, metal-rich clasts. Main minerals are pyroxene and plagioclase. Accessories minerals are silica polymorph, metal, polycristalline troilite and chromite.
Geochemistry: Low-Ca pyroxene Fs46.3±6.2Wo9.3±5.8 (n=7), rangeFs35.9-54.7Wo21.3-1.8, FeO/MnO=33.6±2.2. Plagioclase An93.9±0.5Ab5.8±0.6Or0.3±0.0 (n=3).
Classification: Achondrite (eucrite)
Specimens: 5.13 g and a polished section at CEREGE. Main mass with Pierre-Marie Pelé.

Mass (g): 25.36
Pieces: 1
Class: Eucrite
Weathering grade: moderate
Ferrosilite (mol%): 46.3±6.2 (n=7)
Wollastonite (mol%): 9.3±5.8
Magnetic suscept.: 4.40
Classifier: J. Gattacceca, L. Krämer Ruggiu, CEREGE
Type spec mass (g): 5.13
Type spec location: CEREGE
Main mass: Pierre-Marie Pelé
Comments: Work name PM15E1; submitted by Lisa Kraemer Ruggiu.